Door-check.



B. WEXLER.

DOOR CHECK.

APPLICATION FILED'JUNE16.19I 5.

1,174,210. Patented Mar. 7,1916.

2 SHEETSSHEET 1.

A fl low Inventor:

THB COLUMBIA PLANDGRAPH .50., WASHINGTON, D. C

by v! Mtty B. WEXLER. DOOR CHECK.

APPLICATION FILED JUNE 16, 1915.

Patented Mar. 7, 1916.

2 SHEETSSHEET 2.

1-1-15 coLuMBlA PLANOGRAPH c0., WASHINGTON, n. c.

To all whom it may concern i BENJAMIN E LER, or ew YORK, N. Y,"

' noon-annex.

. Be it known that I, BENJAMIN WEXLER, a citizen of the United States, and a resident of New York city, borough of Brooklyn, in

the county of Kings and State of New York,

. great force and noise when closing, which device is simple in construction, 'strong and durable, can be appliedon anyw door which slides either vertically or horizontally and prevents the doors. from coming in contact with each other or with the-j' amb so viovlently as to cause a co-ncussion which producesa noise or which effect the doors I 1 I In'the accompanying drawings in which like letters of reference indicatelike parts in all the figures: Figure lris a face view of the preferred construction-of my improved door check, when applied to vertically moving self closing elevator doors. Fig. 2 is an outside longitudinal view of Fig. 1'. Fig. 3 is an inside longitudinal view of Fig.- 1. Fig. 4 is a front elevation showing a modification. Fig. 5 is an elevation showing an other modification. Fig. 6 is an elevation of the doors, opened. Fig. 7 is an elevation of the doors, closed.

Elevator doors are, in many cases, made self closing, that is to say, the same are connected by a chain passing over a pulley and the upper door is overweighted'so that when released the upper door descends and'raises the lower door, until their adjacent edges are in contact. Usually a spring is provided for ivin the doors a certain initial veloc- 1ty which increases as their lnne'r edges approach each other and the doors which frequently are of great weight, come together with great force producing a very; disturbing noise and endanger the limbs of the attendants, as it may frequently happen that they have their hands between the two doors. 7 f

In the accompanying drawings the usual angle iron, guide 1 for such vertically mov- Specification of Letters l atent.

might uriously ingelevator shaft doors issecured in the shaftiand on this guideythe door is guided 1n its vertical movements by any well known means which are not shown and which form no part of the present'invention. A bar 2 which is forkedrat its upper end as shown at3 or slotted from front to rear, is guided on the inner surface of the flange 40f the angle iron 1 by two pins 5 which pass through a longitudinal slot 6 of the flange 4: and are securedin aplate 7 which slides on TED srATnsrArEN'r FE g Patented Mar. 7, 1916.

Applicationfiled June 16,1915. seriamaaea s.

theoutsideoftheflange 4 so that this bar 2 .is guided tomove vertically only. Beneath thisibar a buffer 8, preferably made of rub ber is sec lred against the inner surfaceofthe. flange 4,-by bolts-9 which are passed through they buffer and secured by nuts 10 on the outside of the flange-4f. \Vhen the bar 2 is raised and then is released and forciblyzthrown downward by 'awei'ght or spring-its lowerend" strikes the buffer- 8. In the fork orslot at the upper end of the bar 2 a latch; 11" ispivotedby a'pivot 12 so that its free end can move transversely to the upper end of-the bar2, that is toward and from the base of the angle iron 1.- Apin13 projects from this latch and on the same one end: of a spring 14- is selcured,-the lower end of which. is secured to a screw rod 15 which is passed looselythrougha flange or bracket l6 projecting outward from the angle iron and the screw rod isadjustably secured by two nuts 18 and 19. The tension of this spring keeps the latch 11 projected from the front edge of the bar 12. and in the path of a bar 20 which projects from the side edges of the. elevator door as indicated in dotted lines in the drawings. An angle iron 2lis secured on the base of the angle iron 1 by means of two. screws 22 which are passed through a longitudinal slot 23. The flange 24eofthe angle iron 21 rojects some distance beyond the base of the angle iron and is'tapered toward the upper end of the bar 2'as shown at 25 so as to form a cam.

The operation of the construction shown in Figs. 1,-2 and 3 is substantially as follows: The two vertically mounted doors, i, s

which: move toward each other when closing and from each other while be ng opened,

are so-weight-ed as to be self closing, that is f' superior or greater weight of the upper door, the projecting cross bar 20 on the lower door moves upward along the outer edge of the flange 40f the angle iron 1, gradually obtaining great speedjand force. Ashort distance beforethe doors come together the bar 20 encounters the latch 11, which is projected by the spring lei beyond the outer edge of the flange i and thereby the speed of the door ismaterially checked but not completely and the bar continues its upward travel, but-very much reduced in speed. .It lifts or'raises the latch 11 and also lifts the bar 2 against the tension or strength of the spring 1-1: which tends to drawthe'bar 2 downward but the weight of the upper door, which produces an upward motion of the door carrying the bar 20, is suflicient to pull the bar 2 upward notwithstanding the power of the spring 1 1 which is thereby stretched v 7 distance, the pin "13 of the latch 11 strikesagainst the beveled portion of the angleiron 21 and while the bar 2 travels upward 7 toward therear, that is, in the direction and-thus the speed of the doors approaching each other becomes less. After the bar -2and its latch 11 have traveled upward a short this bevel' 25 gradually. pushes the pin 13 from the free end of the flange i, thereby pgradually withdrawing the latch'from over out sufl icient'force to injure the hands or 'the 'bar 2O -and as the bar 2 continues its upward travel and the spring 14- is' 'being stretched, th-elatch isv-finally entirely withdrawn from over the bar 20, thedoors are thus released and underthe" weight of the upper door which is now entirely free, they come in contact, but with little speed and force. The checking device is so positioned that the bar 20 is released by the latch only when the doors have about six or eight inches each totravel before'coming in con tact, the result being that they come in contact very gently without any noise and withedges coming in contact, this spring must be loosened. It may occur that the tapered end 25 of the angle iron 21 withdraws the latch too soon and in such cases. provision is made for adjusting the angle bar 21 higher. On the other hand it may occur that the angle bar 21 acting as a cam does not retract the latch soon enough and in that case the said angle bar 21 must be lowcred. In fitting the device'to the door the mechanic must adjust the parts according to the weights of the doors in the manner above described.

It will be observed that the spring 14 performs the double function of pulling the rod downward and of also keeping the-latch 11 projected beyond. the front edge of the door in the construction shown in Figs. 1,

2 and 3. This device may be providedfor one or both sides of the door. Preferably it is provided at each side edge. v In the modification shown in Figs. i and 5 the upper end of the bar 2 is slotted instead of being forked and from the same a rod 26 projects upward. T his rod is provided-with a sho-ulderor offset 27 above which weights 28 can be placed upon the rod. The spring 14 is dispensed with but a spring 29 must then be used for throwing the latch '11 outward and into the path of the bar 20. (3therwise the construction remains the same.

WVhen the doors are released and the lower door iscarried upward with great force by the weight of the upper door, the bar 20 carried by the lower door encounters the projected latch ll'whereby the speed of the. door. is checked. The bar 20 then-lifts the weighted bar 2 whereby the speed of the up ward motion of the lower door is almost completely checked until the latch 11 i is again withdrawn by the engagement of the pin 13 with the cam edge 25 of the angle piece 21. The weights 28 thus not in sub stantially the same manner as does the spring ii and the number of weights 28 to act upon the bar 20 can be increased or decreased according to the weight, size and so forth of the door. 1

In the construction shown in Fig. 5 the weights 28 on the rod 26 are replaced by a plunger 30 which'is forced into a cylinder or cup 31 fastened to the angle guide 1 and open at the bottom. lVhen the bar 20 strikes the latch 11 and lifts the bar 2, the air in the cylinder or cup 31 is compressed and offers a resistance to the raising door which checks the upward speed of the same until the latch 11 is again withdrawn by the cam edge formed on the angle bar 21.

Having described my invention what I claim as new and desire to secure by Letters Patent is:

1. The combination with a guide for a door, of a bar mounted on said guide to be moved by the door in the direction in which the door moves when closing, a normally projected latch on said bar in the path of the closing door, and a cam piece on the guide for withdrawing said latch after the bar has been moved a predetermined distance by the door, substantially as set forth.

2. The combination with a guide for a door, of a bar mounted on said guide to be moved in the direction in which the door moveswhen closing, a normally projected latch on said bar in the path of the closing door, an adjustable cam piece on the guide for withdrawing said latch after the bar has been moved a predetermined distance by the door, substantially as set forth.

3. The combination with a guide fora door, of a bar mounted on said guide to be moved by the doorin the direction in which the door moves when closing, a'normally projected latch on said bar in the path of the closing door and means for automatically withdrawing said latch after the bar has been moved a predetermined distance by the door, substantially as set forth.

4. The combination with a'guide fora door,of a bar mounted on said guide to be moved by the door in the direction in which the door moves when closing, a normally 7 after the bar has been moved a predetermined distance, substantially as set forth.

6. The combination with a guide for a door, of a bar mounted on said guide to be moved by the door in the direction in which the door moves when closing, a normally projected latch on said bar in the path of the closing door, a device on thesaid guide for automatically withdrawing said, latch after the bar has been moved a predetermined distance and means for adjusting said device, substantially as set forth- 7. The combination with a guide for a door, of a bar mounted on said guide to be moved by the doorlin the direction in which the door moves when closing, a normally projected latch on said bar in the path of the moving door, means for increasing the resistance ofiered by said latch to the door and a means for automatically withdrawing said latch after the bar has been moved a predetermined distance. by the door, substantially as set forth.

8. The combination with a guide for a door, of a bar mounted on said guide tobe moved by the door in the direction in which the door moves when closing, a normally projected latch on said bar in the path of the moving door, means for increasing the resistance offered by said bar to the closing door, which means are adjustable and means for withdrawing said latch after the bar has been moved a predetermined distance b the door, substantially as set forth. 7

9. The combination with a guide for a door, of a bar mounted on said guide to be moved by the door in the direction inwhich the door moves when closing, of a normally projected latch on said bar in the path of the closing door, a spring acting on said latch and a cam piece on the guide for withdrawing said latch after the bar has been 'moved a predetermined distance by the door, substantially as set forth. 7

10. The combination with a guide for a door, of a bar mounted on said guide to be V moved by the door in the directionin which the door moves when closing, a normally projected latch on said bar in the path of the closing door, a pin on said latch and a cam piece on the guide for action upon the latch, substantially as set-forth.

11. The combination with a guide-for a sliding door, of a bar mounted to slide on said guide, a normally projected latch on said bar in the path of the door, a pin on' said latch and an angle bar having its lower end tapered to form a cam secured on the guide above said bar, substantially as set forth. 7 I

12. The combination with an angle iron guide for sliding doors, of a bar, a plate secured on said bar and guided on the flange of the angle iron guide, a normally projected latch'on said bar, a pin on the latch,

and an angle iron having its lower end tapered to form 'a cam above said pin, substantially as set forth.

13. The combination with an angle iron guide for sliding doors, of a bar, a plate. 7

secured on said bar and guided on the flange of the angle iron guide, a normally projected latch on said bar, a pin on the latch,

an angle iron having its lower end tapered to form a cam above said pin and a buffer for said bar, substantially as set forth.

14. The combination with aguide for a sliding door, of a bar mounted movably on said guide, means for engaging the door with said bar, and other means for breaking said engagement of the door with the bar. substantially as set forth. I

Signed at New York city, borou h of Manhattamin the county of New Yor and State of New York A. D. 1915. I

BENJAMIN WEXLER.

Witnesses:

. MARION SHAW,

JOHN W. PnELLE. V

this 4th day of June Copies of this patent may be obtained for five cents each, byaddressing the Commissioner of Patents,

Washington, D. G. 

